Essays about: "Many Body Physics"

Showing result 36 - 40 of 63 essays containing the words Many Body Physics.

1. 36. Charge transport in a Hubbard-Holstein junction: Preliminary results from a DFT approach.

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Eric Ceccarelli; [2019]
   Keywords : Density functional theory; DFT; Hubbard-Holstein; Hubbard-Holstein model; HH; Quantum transport; Physics and Astronomy;

   Abstract : Many-body systems are extremely complicated to describe due to mutual interactions between the constituent particles. This is for example the case of systems with electron-electron (e-e) and electron-phonon (e-ph) interactions. READ MORE

3. 37. Radiation protection measurements in clinical practice - Dosimetry with NaCl pellets

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Petter Wilke; [2019]
   Keywords : Physics and Astronomy;

   Abstract : Within the field of medical radiation protection, radiation safety and personal dosimetry, there is a constant pursuit for improving existing methods and evaluating new approaches for measuring and quantifying the radiation doses that hospital staff may be exposed to in their clinical work. There are numerous ways of determining what doses the staff are being exposed to and the most commonly used is based on thermoluminescent dosemeters (TLD) with e. READ MORE

4. 38. Variational approach to the many-body problem with error estimation

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Claes Rogius Svensson; [2018]
   Keywords : Many-body problems; Slater determinants; variational approach; Physics and Astronomy;

   Abstract : In this thesis a method for doing approximate calculations of the ground state of quantum mechanical many-body systems is developed and implemented. This method uses the Hartree-Fock method as a starting point and approximates the ground state as a linear combination of non-orthogonal Slater determinants. READ MORE

5. 39. Optimizing the functionalities of a code for real time dynamics of finite systems

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Yasser Mahfoud; [2018]
   Keywords : Physics and Astronomy;

   Abstract : The many-body problem in quantum mechanics always presents new challenges and ways to discover new properties of existing materials. The difficulty (if not the impossibility) to solve the many-body problem analytically makes the numerical methods an appealing approach. READ MORE

6. 40. Near-local density approximation approach to one-dimensional lattice systems

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Basheer Joudeh; [2018]
   Keywords : DFT; Hartree; Hartree-Fock; LDA; BALDA; Mean-field; Hubbard; SOFT; Physics and Astronomy;

   Abstract : Describing many-body quantum systems has been an analytically and computationally challenging task since the advent of quantum mechanics. However, in the past 50 years as a result of our technological advancement and the emergence of methods such as density-functional theory (DFT), we have taken crucial steps forward regarding our ability to study and understand large quantum systems. READ MORE